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hey guys my engine is a 557 with 14/1comp.1050 dom carb and it has cast dooe-r heads on it. no dyno numbers but it runs 5.86 at 119 in the 1/8 at 3000lbs i have a set of kasse ported scj aluminum heads just wondering how much better these were or just a weight savings the dooe-r heads have been ported but i do not have flow #s thanks
 

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alot depends on if your factroy heads are ported,seen 1 set of factory cj once ported they flowed 394 cfm,cant remember what the exhaust did.these were on a class wining truck pull engine
 

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Long Live The King
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hey guys my engine is a 557 with 14/1comp.1050 dom carb and it has cast dooe-r heads on it. no dyno numbers but it runs 5.86 at 119 in the 1/8 at 3000lbs i have a set of kasse ported scj aluminum heads just wondering how much better these were or just a weight savings the dooe-r heads have been ported but i do not have flow #s thanks
weight savings is around 80lbs total.

Hp between 75-100 hp depending on rpm. What do you rev it to?

G

Jon
 

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You can group all available Cobra Jet style heads together such as Blue Thunder, D00E-R, TFS CJ, TFS Street Heat, Edelbrock CJ, Ford A-429, Ford SCJ, and P-51. Port them, same valves sizes and there won't be enough difference between them to pick one over the other.

One example I saw was a 514 with ported D00E-R heads. The owner switched to Ford SCJ's and went two tenths slower. Now to be fair these SCJ's were out of the box as cast. he had them ported and they ran the same as the iron CJ. There is just too much misinformation out there. You have to compare apples to apples or as close as you can get.

The only way you can see a 75 HP gain is to put a 390 cfm pair of any of the above in place of as cast 325 cfm heads.
 

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You can group all available Cobra Jet style heads together such as Blue Thunder, D00E-R, TFS CJ, TFS Street Heat, Edelbrock CJ, Ford A-429, Ford SCJ, and P-51. Port them, same valves sizes and there won't be enough difference between them to pick one over the other.

One example I saw was a 514 with ported D00E-R heads. The owner switched to Ford SCJ's and went two tenths slower. Now to be fair these SCJ's were out of the box as cast. he had them ported and they ran the same as the iron CJ. There is just too much misinformation out there. You have to compare apples to apples or as close as you can get.

The only way you can see a 75 HP gain is to put a 390 cfm pair of any of the above in place of as cast 325 cfm heads.


.....so very true Gary, I dont sea a real HP gain either, but the weight savings iz a Big +. guys, if NE1 knows BBF's, it's Gary, I've know him for @30+ years and he lives n' breathes BBF's:cool:
 
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